Please do not take this as a thread to start a war over Air cooling Vs Water. I am genuinely interested in the answers.
I have always used Air cooling and my current Scan system uses a Noctua cooler. I've often looked at water cooling and as I get ready to purchase again this seemed a good time to reassess, especially as water coolers seem to have come on a lot in the past few years.
My question is why switch to water.? From what I've seen most people overclocking using water are only using similar / marginally better speeds than on air. I spoke to Scan and they instantly said "Air". Air also seems quieter in most cases (no pump noise) and more reliable (far less to go wrong). Air is also a lot cheaper.
I appreciate that Water definitely looks nicer, but as I will be using a solid sided Fractal R5 the aesthetic angle is irrelevant.